Answer Choices
They were limited by the expensive nature of animal research.
They were not expected to yield products ready for human use.
They were completed when an anticoagulant compound was identified.
They focused only on the molecular properties of cows, goats, and sheep.
Explanation for Question 25 From the Reading Section on the Official Sat Practice Test 4
Question 25 says, what does the author suggest about the transgenic studies done in 2 the 1980s and 1990s? So let's look back in the passage and see what 3 the author has to say about this. It comes in the third paragraph of 4 the passage it starts with throughout the 1980s and nineties studies provided proof of 5 principle. So this proof of principle is basically just saying, 6 theoretically, this idea of farming of using animals to produce 7 human medicine is valid. 8 You can do this in theory. So it says, 9 as in it says, as scientists created transgenic mice, 10 sheep, goats, pigs, cattle, and rabbits that did in fact make therapeutic compounds in 11 their milk. But then it goes on to say at first, 12 this work was merely gee was scientific geekery lab bound thought experiments come true. 13 So it was more far-fetched ideas being proven true in theory. 14 But as we know, things in theory, 15 aren't necessarily true in reality, 16 just because of the number of variables present. 17 But it goes on to say that all change with Actron a drug produced 18 by the Massachusets for GTC Biotherapeutics. 19 So basically what this evidence is saying that they didn't expect this theoretical 20 proof to translate into realistic effects or implications. 21 So let's look at the answer choices and see which one best matches up. 22 So it says answer choice a says they were limited by the expensive nature 23 of animal research. So you won't find anywhere here where they're talking about anim...